Thanks guys - slowly things are becoming clearer.
As to why I am doing this; my current workflow is to Export & convert to DCAM 3. In Photoshop I then assign a DCAM 3 variant as I like the saturation treatment that this can provide, which fits with my feel for my images . i would then finish the file in Photoshop, save as a PSD, then resize, output sharpen using Photokit Sharpener and output to print or web.
Works well for me, but...
I also like the workflow that LR provides and I like the soft-proof facility and Print Module (much better than PS to me). Given this, I have been trying to work out if I can remain in LR, just doing a return trip to Photoshop and then output the resulting TIFF from LR.
What I don't understand is what impact the assigning of a DCAM3 Variant would have on the LR processes; hence the question.
Appreciate all advice and pointers